lighttpd 1.4.x
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109 lines
2.8 KiB
109 lines
2.8 KiB
#include "first.h" |
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#include "fdevent_impl.h" |
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#include "fdevent.h" |
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#include "buffer.h" |
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#include <sys/time.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#ifdef FDEVENT_USE_SELECT |
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__attribute_cold__ |
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static int fdevent_select_reset(fdevents *ev) { |
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FD_ZERO(&(ev->select_set_read)); |
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FD_ZERO(&(ev->select_set_write)); |
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FD_ZERO(&(ev->select_set_error)); |
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ev->select_max_fd = -1; |
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return 0; |
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} |
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static int fdevent_select_event_del(fdevents *ev, fdnode *fdn) { |
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int fd = fdn->fd; |
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FD_CLR(fd, &(ev->select_set_read)); |
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FD_CLR(fd, &(ev->select_set_write)); |
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FD_CLR(fd, &(ev->select_set_error)); |
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return 0; |
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} |
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static int fdevent_select_event_set(fdevents *ev, fdnode *fdn, int events) { |
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int fd = fdn->fde_ndx = fdn->fd; |
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/* we should be protected by max-fds, but you never know */ |
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force_assert(fd < ((int)FD_SETSIZE)); |
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if (events & FDEVENT_IN) { |
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FD_SET(fd, &(ev->select_set_read)); |
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} else { |
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FD_CLR(fd, &(ev->select_set_read)); |
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} |
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if (events & FDEVENT_OUT) { |
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FD_SET(fd, &(ev->select_set_write)); |
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} else { |
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FD_CLR(fd, &(ev->select_set_write)); |
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} |
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FD_SET(fd, &(ev->select_set_error)); |
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if (fd > ev->select_max_fd) ev->select_max_fd = fd; |
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return 0; |
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} |
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static int fdevent_select_event_get_revent(const fdevents *ev, int ndx) { |
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int revents = 0; |
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if (FD_ISSET(ndx, &ev->select_read)) revents |= FDEVENT_IN; |
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if (FD_ISSET(ndx, &ev->select_write)) revents |= FDEVENT_OUT; |
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if (FD_ISSET(ndx, &ev->select_error)) revents |= FDEVENT_ERR; |
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return revents; |
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} |
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static int fdevent_select_event_next_fdndx(const fdevents *ev, int ndx) { |
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const int max_fd = ev->select_max_fd + 1; |
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for (int i = (ndx < 0) ? 0 : ndx + 1; i < max_fd; ++i) { |
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if (FD_ISSET(i, &(ev->select_read))) return i; |
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if (FD_ISSET(i, &(ev->select_write))) return i; |
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if (FD_ISSET(i, &(ev->select_error))) return i; |
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} |
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return -1; |
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} |
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static int fdevent_select_poll(fdevents *ev, int timeout_ms) { |
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int n; |
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struct timeval tv; |
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tv.tv_sec = timeout_ms / 1000; |
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tv.tv_usec = (timeout_ms % 1000) * 1000; |
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ev->select_read = ev->select_set_read; |
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ev->select_write = ev->select_set_write; |
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ev->select_error = ev->select_set_error; |
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n = select(ev->select_max_fd + 1, &(ev->select_read), &(ev->select_write), &(ev->select_error), &tv); |
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for (int ndx = -1, i = 0; i < n; ++i) { |
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fdnode *fdn; |
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ndx = fdevent_select_event_next_fdndx(ev, ndx); |
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if (-1 == ndx) break; |
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fdn = ev->fdarray[ndx]; |
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if (0 == ((uintptr_t)fdn & 0x3)) { |
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int revents = fdevent_select_event_get_revent(ev, ndx); |
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(*fdn->handler)(fdn->ctx, revents); |
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} |
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} |
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return n; |
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} |
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__attribute_cold__ |
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int fdevent_select_init(fdevents *ev) { |
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ev->type = FDEVENT_HANDLER_SELECT; |
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ev->event_set = fdevent_select_event_set; |
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ev->event_del = fdevent_select_event_del; |
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ev->poll = fdevent_select_poll; |
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ev->reset = fdevent_select_reset; |
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return 0; |
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} |
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#endif
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